Suggestions are made on improving the design of the top frame with double inlets for different stocks so as to render square plansifter perfecter.
对不同物料双进口的筛顶格提出了改进意见，使高方筛结构更趋完善。
Suggestions are made on improving the design of the top frame with double inlets for different stocks so as to render square plansifter perfecter.
对不同物料双进口的筛顶格提出了改进意见，使高方筛结构更趋完善。
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